Pregnant Jessica Simpson Poses Nude for Elle

And you thought Jessica Simpson's daisy dukes were scandalous! The 31-year-old mom-to-be posed nude for the April cover of Elle.

Simpson, who announced her pregnancy in a particularly unique fashion last October, also revealed in the magazine that she and her fiancé, NFL player Eric Johnson, are expecting a baby girl. Johnson is also featured in the spread, which hits newsstands March 20.

The pop star recalled the moment when she first sensed she was pregnant. "We were goin' to have an all-day drinking binge," Simpson said. "Gonna ride our bikes, hang out...do naughty things. But I started feeling this overwhelming guilt. Why would I feel guilt at the idea of going out and having cocktails with my friends?"

Now that she's pregnant, Simpson's drinking days are over — but it wasn't an easy transition, she said. "Givin' up my Scotch? My Macallan 18? That was hard for me!" Simpson said. "Though now being pregnant, you crave other things. A big thing of water sounds great!"

Simpson and Johnson have already decided on a name. "We're embroidering it on things. It's nothing shocking and nothing you'll have to add to the dictionary. When people hear it, they'll know why," she said.

After the cover was released Wednesday, Simpson, who can next be seen as a mentor on NBC's Fashion Star, tweeted, "My @Ellemagazine cover out today! I'm a lil nervous but I've never felt more beautiful or empowered."